| Quercus petraea |
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| A mature tree |
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| Scientific classification |
| Kingdom: |
Plantae |
| Clade: |
Tracheophytes |
| Clade: |
Angiosperms |
| Clade: |
Eudicots |
| Clade: |
Rosids |
| Order: |
Fagales |
| Family: |
Fagaceae |
| Genus: |
Quercus |
| Subgenus: |
Quercus subg. Quercus |
| Section: |
Quercus sect. Quercus |
| Species: |
Q. petraea |
| Binomial name |
Quercus petraea
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| Subspecies |
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See text. |
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| Distribution map |
| Synonyms |
- Quercus robur var. petraea Matt.
- Quercus brevipedunculata Cariot & St.-Lag.
- Quercus calcarea Troitsky
- Quercus columbaria Vuk.
- Quercus coriacea Bechst.
- Quercus coronensis Schur
- Quercus decipiens Behlen
- Quercus dispar Raf.
- Quercus durinus Raf.
- Quercus erythroneura Vuk.
- Quercus esculus L.
- Quercus longipetiolata Schur
- Quercus mas Thore
- Quercus mespilifolia Wallr.
- Quercus peraffinis Gand.
- Quercus petiolata Schur
- Quercus regalis Burnett ex Endl.
- Quercus sessiliflora Salisb.
- Quercus sessilis Ehrh. ex Schur
- Quercus spathulifolia Vuk.
- Quercus sphaerocarpa Vuk.
- Quercus sublobata Kit.
- Quercus huguetiana (Franco & G.López) Rivas Mart.
- Quercus colchica Czeczott
- Quercus dshorochensis K.Koch
- Quercus hypochrysa Steven
- Quercus iberica Steven ex M.Bieb.
- Quercus kochiana O.Schwarz
- Quercus kozlowskyi Woronow ex Grossh.
- Quercus lamprophyllos K.Koch
- Quercus polycarpa Schur
- Quercus sorocarpa Woronow ex Maleev
- Quercus szowitzii Wenz.
- Quercus abietum Kotschy ex A.DC.
- Quercus cedrorum Kotschy
- Quercus ibicis Kotschy ex A.DC.
- Quercus pinnatiloba K.Koch
- Quercus subalpina Kotschy ex A.DC.
- Quercus tergestina Wenz.
- plus a long list of invalid names and another long list of names below the species level
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Quercus petraea, commonly known as the sessile oak, Welsh oak, Cornish oak, Irish oak or durmast oak, is a species of oak tree native to most of Europe and into Anatolia and Iran. The sessile oak is the national tree of Ireland, and an unofficial emblem in Wales and Cornwall.